I modified my EvMA Bands and replaced EMA with RMA. The center line is named RvMA and is a volume-weighted Running Moving Average. Since the original RMA is a moving average line that is quite slow to respond, it can be said that the part where RvMA moves significantly is price fluctuations accompanied by volume. The standard deviation used in this Inge is the newly developed Running and volume-weighted standard deviation smoothed by RMA. I think that the usage in trading is the same as the Bollinger band